I got mine at Toys R Us. I just kept phoning till I found out they had some coming in and showed up there at 7am on a Saturday morning. Sat in my car and then stood in the rain till they came out and handed out chits. Good luck because I don't think it's going to be easy to find one.
Okay, my turn... anyone have a Wii Fit for sale (or can suggest where I might find one -- I've been living under a rock for the past few months so I appreciate the help! )